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5W30 20 30.77%
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Old 10-29-2011, 09:52 AM   #1
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Who actually switches to 5W in the winter?

Simple poll....

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Old 10-29-2011, 09:56 AM   #2
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I use 10w30 year round, but it is synthetic, so that helps. I've never had any issues, even when it was 0 degrees out, now my battery, that was a different story. This is up in Flint Michigan btw.

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Old 10-29-2011, 09:58 AM   #3
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Northern IN 10w30---but Jeep sleeps in 60° garage--in the winter most of the time 'cept when at work during the day.
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Old 10-29-2011, 10:49 AM   #4
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Originally Posted by deathphoenix99 View Post
I use 10w30 year round, but it is synthetic, so that helps. I've never had any issues, even when it was 0 degrees out, now my battery, that was a different story. This is up in Flint Michigan btw.
Thanks. I also use synthetic (Mobil 1), but this is the first winter with my Jeep. Can't decide whether to switch to the 5W from November through April. I live in CT...

Oh, and not that it relates, BUT WE ARE GETTING UP TO 12" OF THE WHITE CRAP TODAY!!!!!!!!!!!!!!!!
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Old 10-29-2011, 12:08 PM   #5
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I follow my owners manual. So with where I live in WV I run 5w-30 in winter. First snow was today ironically. I use Valvoline Full synthetic 5w in winter and 10w the rest of the year, so I'm not sure how much it matters, but it's what it calls for.
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Old 10-29-2011, 01:10 PM   #6
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Gets 30 below up here but I am running 10 30 synthetic blend. According to jeep they actually recommend 10 30 in the older TJs now I believe but don't think it matters much.

Jeep stays in garage too. I just bought a new battery this year.
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Old 10-29-2011, 01:22 PM   #7
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M1 5W-30 in winter. M1 10W-30 in summer.
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Old 10-29-2011, 08:23 PM   #8
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Whatever is on sale. Which happened to be chevron 10 30.

4.0s don't ask for much.
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Old 10-30-2011, 06:02 AM   #9
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I voted 10-30. (Mobil 1 full syn.) I normally would use 5-30 on any modern vehicle because all the mfgr's recommend it, but my 2000 TJ's book is "preferring" me to use the 10-30.
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Old 10-30-2011, 06:30 AM   #10
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I use good ol' Quaker State 10W30 year around in my '01 TJ as that's what it calls for. Synthetic is a waste, IMO, not to mention to expensive for my blood!

Jeep sets in garage most of the winter anyway. Only driven on "nice" winter days.

I use 5W30 in most any other vehicle though.

You people that are already getting the snow can keep it also. Hate that miserable crap!
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Old 10-30-2011, 02:29 PM   #11
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I dunno, maybe I should start thinking about 5W-30 or maybe even 0W-30 during the winter. Afterall, it get down to nearly the low 40's here in San Diego here in the winter.
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Old 10-30-2011, 05:43 PM   #12
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I've never given it a thought. 10w-on up year around.
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Old 10-30-2011, 06:33 PM   #13
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Owners Man. shows 10-30, so 10-30 it is. Keep it simple.
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Old 10-30-2011, 07:37 PM   #14
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Owners Man. shows 10-30, so 10-30 it is. Keep it simple.
Read your owner's manual a little more closely... look for where it recommends 5W-30 in cold conditions.
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Old 10-30-2011, 08:14 PM   #15
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Yep.
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Old 10-30-2011, 10:02 PM   #16
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The owners manual recommends 5 30 for colder climates but according to jeep I now think they have changed it to 10 30 once there are high miles.

That is what I was told by my jeep service manager.
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Old 10-30-2011, 11:07 PM   #17
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Quote:
Originally Posted by WaterDR
The owners manual recommends 5 30 for colder climates but according to jeep I now think they have changed it to 10 30 once there are high miles.

That is what I was told by my jeep service manager.
I fail to see the logic here. Both are the same viscosity when at operating temp. When cold both are going to be very thick.
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Old 10-30-2011, 11:18 PM   #18
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mines a 4cyl and calls for 5w-30 so i always run 5w30 ;] hahahah
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Old 10-31-2011, 12:07 AM   #19
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I run 10w30 in all my vehicles here in Northeast Ohio all year round. We see pretty cold temperatures here, and I've never had a single problem running 10w30. That's including our 1994 Toyota Camry that saw 250,000 miles of Northeast Ohio winters, which we actually gave away recently to a family in need.
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Old 10-31-2011, 02:56 AM   #20
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Im going to run a 0w this year.
the first number on the viscosity rating is only for start up temps, once at operating temp there is no difference in thickness from a 0w-30 to a 10w-30 or even a strait 30. at 200 degrees a 30wt is a 30wt.

also, ALL oils and i mean ALL, are too thick at start up and the colder it gets the worse it gets. most engine wear occurs when the oil is not hot and is too thick for the engine. so using a thinner Xw oil is going to reduce the time it takes for the oil to thin out and make the engine happy.

so in theory a 0w-30 is the best you can do for your engine because the oil is going to flow the best when cold and act JUST like a 10w-30 once the oil is a operating temperature.

Motor Oil 101 - Bob is the Oil Guy feel free to read these articles and better understand what "10w-30" means.
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Old 10-31-2011, 03:54 AM   #21
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Quote:
Originally Posted by Jerry Bransford View Post
I dunno, maybe I should start thinking about 5W-30 or maybe even 0W-30 during the winter. Afterall, it get down to nearly the low 40's here in San Diego here in the winter.
Low 40s - just run straight 40w year round.
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Old 10-31-2011, 04:01 AM   #22
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Originally Posted by freeskier View Post
I fail to see the logic here. Both are the same viscosity when at operating temp. When cold both are going to be very thick.
You are correct about the 30w at operating temp, but multi-vis oil assumes the lower number when cold, so the 5w is thinner than the 10w before starting.

High mileage engines assume looser clearances, so that's where they want the thicker oil to keep it below the rings to avoid burning oil on startup.
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Old 10-31-2011, 04:06 AM   #23
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Quote:
Originally Posted by Jerry Bransford
I dunno, maybe I should start thinking about 5W-30 or maybe even 0W-30 during the winter. Afterall, it get down to nearly the low 40's here in San Diego here in the winter.
I'm just gonna throw this out... Wanna trade? You can come here and enjoy the winter and ill come relax in San Diego it gets a good 0 here it's uh urm. Fun.
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Old 10-31-2011, 08:06 AM   #24
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Quote:
Originally Posted by Jerry Bransford View Post
I dunno, maybe I should start thinking about 5W-30 or maybe even 0W-30 during the winter. Afterall, it get down to nearly the low 40's here in San Diego here in the winter.
NOT FUNNY!!!!!! It SNOWED here in CT over the weekend! 18+" in some locations !!!
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Old 10-31-2011, 09:22 AM   #25
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Doing a little comparison of "Pour Points" using Valvoline for example:
VALVOLINE PREMIUM CONVENTIONAL MOTOR OIL @ http://www.valvoline.com/pdf/All-Climate.pdf
Pour Points for 5W-20; 5W-30 and 10W-30 are -42C; -42C and -36C respectively

VALVOLINE SYNPOWER MOTOR OIL @ http://www.valvoline.com/pdf/SynPower.pdf
Pour Points for 5W-20; 5W-30 and 10W-30 are -42C; -42C and -39C respectively

That's not a big difference between "conventional" and "full synthetic", the 10W-30 being the only grade showing improvement in "pour point"

A real "truly" synthetic 10W-30 motor oil should be getting pour points in the order of -45C and colder. "Full" synthetic is not necessarily true synthetic - keep that in mind. "Full synthetic" is a marketing gimic by the motor oil manufacturers (in NA, not Europe).

AMSOIL Signature Series 100% Synthetic 10W-30 Motor Oil has a "pour point" of -48C (-54F) @ AMSOIL - Signature Series 100% Synthetic 10W-30 Motor Oil (ATM). That would work great for your Jeep in the winter.

So, if looking for a "pour point" colder than -40C say, while still using 10W-30 grade, this Amsoil "Comparison" Chart should help: http://www.synthetic-motor-oil-chang...g-competitors/
Quote:
Pour Point (ASTM D-97):

The Pour Point Test determines the lowest temperature at which a lubricant will flow when cooled under prescribed conditions. The lower a lubricant's pour point, the better protection it provides in low temperature service. As shown in the graph, AMSOIL Synthetic 10W-30 Motor Oil has the lowest pour point of the tested oils.

The low pour point of AMSOIL Synthetic 10W-30 Motor Oil allows it to maintain its fluidity in extremely low temperatures, reducing drag on moving vehicle parts, providing critical engine components with quick, essential lubrication and easing startup in cold temperatures. Wear is greatly reduced and equipment life is extended.
Comparing "pour point" to "no flow" point @ More Than You Ever Wanted to Know About Motor Oil
Quote:
Pour point is 5 degrees F above the point at which a chilled oil shows no movement at the surface for 5 seconds when inclined. This measurement is especially important for oils used in the winter. A borderline pumping temperature is given by some manufacturers. This is the temperature at which the oil will pump and maintain adequate oil pressure. This was not given by a lot of the manufacturers, but seems to be about 20 degrees F above the pour point. The lower the pour point the better.
Keep this in mind: When starting up at cold temperatures during the winter, your oil filter will go into by-pass mode initially. It does this more often than you think and at warmer temperatures than you think. It doesn't have to be -40C.

So, I switch to 5W-20/30, most likely 5W-30 during the winter, mostly for the months of January and February, using conventional oil. That provides some peace of mind, and especially if I head to Quebec to go sking, the temperatures being potentially colder there.
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Old 10-31-2011, 09:49 AM   #26
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South Louisiana, 10-30 year round.
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Old 10-31-2011, 10:09 AM   #27
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Quote:
Originally Posted by Piper54

You are correct about the 30w at operating temp, but multi-vis oil assumes the lower number when cold, so the 5w is thinner than the 10w before starting.

High mileage engines assume looser clearances, so that's where they want the thicker oil to keep it below the rings to avoid burning oil on startup.
Optimal viscosity of a 30 grade oil at 210* is just over 10 cSt. A 5w oil at 40* Celsius is about 15-20 cSt. In other words, if your burning oil at start up with a 5w oil you will be burning oil at operating temp. Doesn't matter what temp the engine is at, optimal protection happens when your oil is 10 cSt. Thats why the most wear on an engine happens during warm up.
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Old 10-31-2011, 01:15 PM   #28
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Originally Posted by TJeepman View Post
Doing a little comparison of "Pour Points" using Valvoline for example:
VALVOLINE PREMIUM CONVENTIONAL MOTOR OIL @ http://www.valvoline.com/pdf/All-Climate.pdf
Pour Points for 5W-20; 5W-30 and 10W-30 are -42C; -42C and -36C respectively

VALVOLINE SYNPOWER MOTOR OIL @ http://www.valvoline.com/pdf/SynPower.pdf
Pour Points for 5W-20; 5W-30 and 10W-30 are -42C; -42C and -39C respectively

That's not a big difference between "conventional" and "full synthetic", the 10W-30 being the only grade showing improvement in "pour point"

A real "truly" synthetic 10W-30 motor oil should be getting pour points in the order of -45C and colder. "Full" synthetic is not necessarily true synthetic - keep that in mind. "Full synthetic" is a marketing gimic by the motor oil manufacturers (in NA, not Europe).

AMSOIL Signature Series 100% Synthetic 10W-30 Motor Oil has a "pour point" of -48C (-54F) @ AMSOIL - Signature Series 100% Synthetic 10W-30 Motor Oil (ATM). That would work great for your Jeep in the winter.

So, if looking for a "pour point" colder than -40C say, while still using 10W-30 grade, this Amsoil "Comparison" Chart should help: http://www.synthetic-motor-oil-chang...g-competitors/


Comparing "pour point" to "no flow" point @ More Than You Ever Wanted to Know About Motor Oil


Keep this in mind: When starting up at cold temperatures during the winter, your oil filter will go into by-pass mode initially. It does this more often than you think and at warmer temperatures than you think. It doesn't have to be -40C.

So, I switch to 5W-20/30, most likely 5W-30 during the winter, mostly for the months of January and February, using conventional oil. That provides some peace of mind, and especially if I head to Quebec to go sking, the temperatures being potentially colder there.
DAMN! Totally value-added knowledge!
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Old 10-31-2011, 02:02 PM   #29
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Originally Posted by bobbav

NOT FUNNY!!!!!! It SNOWED here in CT over the weekend! 18+" in some locations !!!
Hey ". 18" of snow here,,, had a blast trying out my new synthetic winch line moving limbs off the road, plus harvested about a cord and a half of free firewood for my shop/barn,, BTW,, it has to get really darned cold for me to switch to 5w,, 10w works really well till you get down to sub 0 temps ..
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Old 10-31-2011, 03:21 PM   #30
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Hey ". 18" of snow here,,, had a blast trying out my new synthetic winch line moving limbs off the road, plus harvested about a cord and a half of free firewood for my shop/barn,, BTW,, it has to get really darned cold for me to switch to 5w,, 10w works really well till you get down to sub 0 temps ..
Cool! Yeah, the more I read on this, I may just stay with 10W (synthetic). We don't typically get too many minus 0 days here in CT, but 16 degrees sure feels like it!

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